species that is not native to (i.e., not found in, unless imposed by humans) a region.
A species occurring in an area outside of its historically known natural range as a result of intentional or accidental dispersal by human activities. Also known as introduced species.
Any species, including its seeds, eggs, spores, or other biological material capable of propagating that species, that is not native to that ecosystem. [from Executive Order 13112 on Invasive Species
a plant or animal whose presence in a region is due not to natural causes but rather to either intentional or accidental introduction as a result of human activities
a species introduced outside its normal distribution
A species occurring in an area outside its historically known natural range as a result of intentional or accidental dispersal by human activities (including exotic organisms, genetically modified organisms and translocated species).
species introduced into a particular environment by man; not naturally occurring.
Animals and plants invading and becoming established in areas where they do not normally occur.
These are animals and plants that have "invaded" and become established in areas where they do not usually occur. They can have a negative effect on other plants and animals and the environment. For example, Port Jackson is a plant that was brought here from Australia . It uses so much water that indigenous plants die out.
(also called introduced, exotic, or non-indigenous species): A species that has been transported by human activity, intentionally or accidentally, into a region where it does not occur naturally.
a species that did not originally occur in an area in which it is now found, but that arrived as a direct or indirect result of human activity (see also exotic species).
A translocated or alien species occurring at a place outside its historically known natural range as a result of intentional or accidental dispersal by human activities. ( Natural Heritage Charter) Most are introduced (ie alien or non-native) species such as weeds and feral animals. Some are native species that occur beyond their natural range.
species that do not naturally occur within an area and that have usually arrived in the area as a result of human intervention (whether deliberate or accidental). Alien species often have adverse effects on native species as a result of competition.
Plants and animals which do not arrive naturally in an area - they are brought in by humans. Alien plants often force indigenous species out of the area. Rooikrans is a good example of an alien plant species in the Cape.
See nonnative species.
Species introduced to one country from another
See Introduced species.
(also called introduced, exotic, nonindigenous, or settler). A species that has been transported by human activity, intentional or accidental, into a region where it does not naturally occur (e.g. the soft-shelled clam Mya arenana, the snail Rapana thomasicma, the comb jelly Mnemiopsis leidyi into the Black Sea).
Synonyms: non-native, exotic, non-indigenous, foreign species, subspecies, or lower taxon introduced outside its original distribution area. In plants, it includes any part, gametes, seeds, eggs, or propagules of such species that might survive and subsequently reproduce.